Summary
cls.co.id is a domain controlled by two nameservers at
rad.net.id. They are on the same IP network. Incoming mail for
cls.co.id is handled by one mailserver at
cls.co.id themselves.
ac.id,
co.id,
or.id,
web.id,
mil.id and at least 73 other hosts share nameservers with this domain.
mail.cls.co.id are subdomains to this hostname.
co.id is delegated to five nameservers, however one extra nameserver is listed in the zone. All of them are on different IP networks.